package exception;
/*
* 异常处理机制中的try—catch
* */
public class TryCatchDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了");
        try {
            //String line = null;
            String line = "1234";
            System.out.println(line.length());
            System.out.println(line.charAt(3));
            System.out.println(Integer.parseInt(line));
            System.out.println("!!!!!!!!!!!!!!!");
       /* }catch (NullPointerException e){
            System.out.println("空指针异常");
        }catch (StringIndexOutOfBoundsException e){
            System.out.println("出现字符串下标越界，并处理完毕");
        }*/
        }
        catch (NullPointerException|StringIndexOutOfBoundsException e){
            System.out.println("出现空指针或数组下标越界异常,并处理完毕！");
        }catch (Exception e){
            System.out.println("出现一个未知错误！");
        }
        System.out.println("程序结束了");
    }
}


